;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; ETHERNET.INC ;;
;; ;;
;; Ethernet network layer for KolibriOS ;;
;; ;;
;; Written by hidnplayr@kolibrios.org ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision: 4850 $
ETH_FRAME_MINIMUM = 60
ETH_QUEUE_SIZE = 255
struct ETH_header
DstMAC dp ? ; destination MAC-address
SrcMAC dp ? ; source MAC-address
Type dw ? ; type of the upper-layer protocol
ends
struct ETH_DEVICE NET_DEVICE
mac dp ?
ends
struct ETH_queue_entry
device dd ?
packet dd ?
size dd ?
ends
iglobal
align 4
ETH_BROADCAST dp 0xffffffffffff
endg
uglobal
align 4
ETH_input_event dd ?
ETH_queue rd (ETH_QUEUE_SIZE*sizeof.ETH_queue_entry + sizeof.queue)/4
endg
macro ETH_init {
init_queue ETH_queue
movi ebx, 1
mov ecx, ETH_process_input
call new_sys_threads
test eax, eax
jns @f
DEBUGF DEBUG_NETWORK_ERROR,'K : cannot create kernel thread for ethernet, error %d\n', eax
@@:
}
;-----------------------------------------------------------------
;
; ETH_input
;
; This function is called by ethernet drivers,
; It pushes the received ethernet packets onto the eth_in_queue
;
; IN: [esp] = Pointer to buffer
; [esp+4] = size of buffer
; ebx = pointer to eth_device
; OUT: /
;
;-----------------------------------------------------------------
align 4
ETH_input:
push ebx
mov esi, esp
add_to_queue ETH_queue, ETH_QUEUE_SIZE, sizeof.ETH_queue_entry, .fail
add esp, sizeof.ETH_queue_entry
xor edx, edx
mov eax, [ETH_input_event]
mov ebx, [eax + EVENT.id]
xor esi, esi
call raise_event
ret
.fail:
DEBUGF DEBUG_NETWORK_ERROR, "ETH incoming queue is full, discarding packet!\n"
pop ebx
call NET_packet_free
add esp, 4
ret
align 4
ETH_process_input:
xor esi, esi
mov ecx, MANUAL_DESTROY
call create_event
mov [ETH_input_event], eax
.wait:
mov eax, [ETH_input_event]
mov ebx, [eax + EVENT.id]
call wait_event
.loop:
get_from_queue ETH_queue, ETH_QUEUE_SIZE, sizeof.ETH_queue_entry, .wait
mov eax, [esi + ETH_queue_entry.packet]
mov ecx, [esi + ETH_queue_entry.size]
mov ebx, [esi + ETH_queue_entry.device]
pushd .loop ; return address
push ecx eax
DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_input: size=%u\n", ecx
sub ecx, sizeof.ETH_header
jb .dump
lea edx, [eax + sizeof.ETH_header]
mov ax, [eax + ETH_header.Type]
cmp ax, ETHER_PROTO_IPv4
je IPv4_input
cmp ax, ETHER_PROTO_ARP
je ARP_input
cmp ax, ETHER_PROTO_IPv6
je IPv6_input
cmp ax, ETHER_PROTO_PPP_DISCOVERY
je PPPoE_discovery_input
cmp ax, ETHER_PROTO_PPP_SESSION
je PPPoE_session_input
DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_input: Unknown packet type=%x\n", ax
.dump:
DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_input: dumping\n"
call NET_packet_free
add esp, 4
ret
;-----------------------------------------------------------------
;
; ETH_output
;
; IN: eax = pointer to source mac
; ebx = device ptr
; ecx = packet size
; edx = pointer to destination mac
; di = protocol
;
; OUT: edi = 0 on error, pointer to buffer otherwise
; eax = buffer start
; ebx = to device structure
; ecx = unchanged (packet size of embedded data)
; edx = size of complete buffer
;
;-----------------------------------------------------------------
align 4
ETH_output:
DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_output: size=%u device=%x\n", ecx, ebx
cmp ecx, [ebx + NET_DEVICE.mtu]
ja .exit
push ecx
push di eax edx
add ecx, sizeof.ETH_header
stdcall kernel_alloc, ecx
test eax, eax
jz .out_of_ram
mov edi, eax
pop esi
movsd
movsw
pop esi
movsd
movsw
pop ax
stosw
lea eax, [edi - sizeof.ETH_header] ; Set eax to buffer start
pop ecx
lea edx, [ecx + sizeof.ETH_header] ; Set edx to complete buffer size
cmp edx, ETH_FRAME_MINIMUM
jbe .adjust_size
.done:
DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_output: ptr=%x size=%u\n", eax, edx
ret
.adjust_size:
mov edx, ETH_FRAME_MINIMUM
test edx, edx ; clear zero flag
jmp .done
.out_of_ram:
DEBUGF DEBUG_NETWORK_ERROR, "ETH_output: Out of ram!\n"
add esp, 4+4+2+4
sub edi, edi
ret
.exit:
DEBUGF DEBUG_NETWORK_ERROR, "ETH_output: Packet too large!\n"
sub edi, edi
ret
;-----------------------------------------------------------------
;
; ETH_API
;
; This function is called by system function 76
;
; IN: subfunction number in bl
; device number in bh
; ecx, edx, .. depends on subfunction
;
; OUT:
;
;-----------------------------------------------------------------
align 4
ETH_api:
cmp bh, NET_DEVICES_MAX
ja .error
movzx eax, bh
mov eax, dword [NET_DRV_LIST + 4*eax]
cmp [eax + NET_DEVICE.device_type], NET_DEVICE_ETH
jne .error
and ebx, 0xff
cmp ebx, .number
ja .error
jmp dword [.table + 4*ebx]
.table:
dd .read_mac ; 0
.number = ($ - .table) / 4 - 1
.error:
or eax, -1
ret
.read_mac:
movzx ebx, word [eax + ETH_DEVICE.mac]
mov eax, dword [eax + ETH_DEVICE.mac + 2]
mov [esp+20+4], ebx ; TODO: fix this ugly code
ret